Note that a very similar filter is used in Sawyer MINI, so have a look.Ībout MSR Sweetwater water filter MSR SweetWater Microfilter. Though I am just guessing here as being a physicist by profession. You cannot dry it out so easily and freezing could destroy their walls. My feeling is that there must be an issue with this tool at subzero temperatures. There was a note from the MSR: “ We have identified a flow performance issue with some of the hollow fiber filter cartridges…The issue has been rectified and all filter cartridges currently in production for the MSR HyperFlow microfilter perform to flow specifications.” What I see is some people reporting that it becomes hard to pump very quickly, so they had to back flush very often. 1000 liters life expectancy for the filter.Īs for customers’ reviews, as always, I first read those with the lowest rate.Filter, pores: hollow fiber, 0.2 microns.Technical specifications & summary of features Hence the feature ‘field maintainable’ in the list of specifications. The system is designed to back flush the water, and this is used to clean the filter when necessary.
When attached to the bottle, the filter looks like a bottle handle. When you detach the filter, the lid can be closed and kept on the bottle. The kit comes with a lid (see it in the picture here) which you use to attach it to an MSR bottle. The intake hose is with a large pre-filter which in the same time serves to store the hose. So everything related to the types and sizes of microorganisms that are filtered out by this tool remains the same as for the previous model. Yet, the filter is with ultra fine pores, 0.2 microns only, the same as in the ceramic Miniworks model above. The output is enormous, up to 3 liters per minute, far more than most of the similar tools on the market, hence the word Hyperflow used for the name of the model. The fibers with porous walls are U-shaped (similar to what you can see in the case of Sawyer MINI filter) and fixed at one end. This is an ultra-lightweight ( 7.8 ounces, 221 grams only) water filtering system with so-called hollow fiber technology, so a synthetic-type filter. MSR Hyperflow filter MSR HyperFlow Microfilter. In any case, I would suggest you compare this tool with some other models with ceramic filters described within this site, like Katadyn Pocket, and Katadyn Vario filter. My note: I would not let this filter freeze. I suggest you follow the Amazon link above and see yourself. From what I have seen is that people were complaining about the output flow even for brand new filters.īut the obvious fact is that a vast majority of those reviews are indeed very positive. I have searched several sites with customer reviews and what I have found are very positive opinions of actual users. There are some complaints, though. It improves the water taste and removes any unpleasant smell. 2000 liters life expectancy for the filter.Here is a video by MSR about Miniworks EX filter, have a look: This is the signal you have to buy another one (after some 30 years or so). The current status of the filter you check by a gauge (included) when the filter cylinder becomes thin it will fit into the gauge/caliber. Its wears away in the process, and this is what yields the life expectancy. So you will clean it with a scrub pad (included) in a clean water, so simple. When the filter is not clean you will notice its change of color, and it will become less easy to pump the water through it. So if you drink 2 liters per day, and use the filter 30 days per year, it will last around 33 years. The life expectancy for this ceramic filter is around 2000 litters. The intake hose is attached on the top and its other end (with a pre-filter) you put into the water source. You may attach the tool directly to an MSR or Nalgene bottle. The water is forced through the filter by a mechanical handle. It appears that you might be safe by using this filter. The same holds for the Miniworks microfilter.īelow I give the diameters of typical bacteria which you may expect to find in waters throughout the world: The ceramic filters are typically long-lasting, easy to clean (field maintainable), and they remove everything from water that is of the diameter 0.2 microns (μm) or larger. To put this into a more broad context, you may have a look into my another text where I have described best ways to purify water for drinking, and briefly presented all types of filters used for that purpose. In the US, buy directly at . In EU, please check at Bol.com.